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Detection system applied to shallow beach buried pipeline ultrasonic detecting and positioning

A detection system and ultrasonic detection technology, applied in the field of ultrasonic detection of buried pipelines in shallows

Inactive Publication Date: 2018-09-04
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no special research at home and abroad on this kind of equipment system that can monitor the edge position of buried pipeline targets in real time during construction and excavation operations. [1]

Method used

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  • Detection system applied to shallow beach buried pipeline ultrasonic detecting and positioning
  • Detection system applied to shallow beach buried pipeline ultrasonic detecting and positioning
  • Detection system applied to shallow beach buried pipeline ultrasonic detecting and positioning

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A detection system applied to ultrasonic detection and positioning of shallow buried pipelines, see figure 1 and figure 2 , the detection system includes:

[0053]The multi-channel signal generator (DDS) module 1 generates sound wave emission with adjustable frequency, adjustable pulse number, and controllable delay. After amplifying the high-voltage signal through the power amplifier module 2, it excites the transducer 3 to emit sound waves into the medium.

[0054] The acoustic echo receiving module 4 includes: an isolation limiter circuit 41 , a voltage-controlled amplifier circuit 42 , and an AD acquisition circuit 43 .

[0055] The core main control board 5 includes: an FPGA sub-module 51 and a USB2.0 sub-module 52. The FPGA sub-module 51 is responsible for timing control of each module, including functions such as command parameter configuration, sampling trigger, digital filtering, and data communication.

[0056] An energy storage module 6 is also arranged be...

Embodiment 2

[0060] Below in conjunction with concrete data, accompanying drawing, the scheme in embodiment 1 is further introduced, see the following description for details:

[0061] 1. The design of DDS module 1 is as follows:

[0062] Wherein, the DDS signal transmission module is a generation module of the detection system excitation signal, and is a multi-channel (four channels designed in the embodiment of the present invention) signal generator that produces frequency, phase, and delay controllable, and is controlled by the control bus of the FPGA sub-module 51 control.

[0063] The DDS module 1 in the embodiment of the present invention adopts the AD9959 chip of ADI Company, and the AD9959 chip consists of four DDS cores to form a basic signal generation unit, and each DDS core can provide independent frequency, phase and amplitude programming. This flexibility and high integration are especially suitable for the functional requirements of this detection system. In addition, sinc...

Embodiment 3

[0097] The scheme in embodiment 1 and 2 is carried out feasibility verification below in conjunction with specific example, see the following description for details:

[0098] Set up an experimental environment that simulates buried pipelines under laboratory conditions for system testing. The detailed operations of this step are:

[0099] 1) Build a water tank experiment platform, and the environment where the pipeline is filled with water, such as Figure 7shown. Assume that the distance between the pipe and the transducer is 40cm, the center frequency of the transducer is 100kHz, the peak excitation voltage is 40V, the number of pulses is 4, the system sampling rate is 5MHz, and the voltage control gain is 20dB.

[0100] The echo signal measured by the experimental system is as follows: Figure 8 As shown, it can be seen that:

[0101] (1) The echo of the water tank experiment has a good signal-to-noise ratio, and the peak position of the echo can be clearly judged.

[...

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Abstract

The invention discloses a detection system applied to shallow beach buried pipeline ultrasonic detecting and positioning. The detection system comprises a multi-channel signal generator module, a power amplifying module, a sound back wave receiving module and a core master control board, wherein the multi-channel signal generator module is used for generating sound wave emission signals with adjustable frequency, adjustable pulse number and controllable time delay, the power amplifying module is used for amplifying the sound wave emission signals to high-voltage signals and exciting an energyconverter to send sound wave signals to a medium, the sound back wave receiving module is used for receiving the sound wave signals and comprises an isolation amplitude limiting circuit, a voltage controlled amplifying circuit and an AD gathering circuit, the core master control board is of an eight-layer PCB structure, the sequence of stacking layers is of a signal layer, a ground layer, the signal layer, the ground layer, a power source layer, the signal layer, the ground layer and the signal layer, bottom layer shields are added between the signal layers, and the core master control board is used for command parameter configuration, sampling trigger, digital filtering and data communication and comprises an FPGA submodule and a USB2.0 submodule. By means of the detection system appliedto shallow beach buried pipeline ultrasonic detecting and positioning, the acoustic signal data can be finally obtained stably and subsequent algorithm processing can be performed to obtain the pipeline detecting and positioning result.

Description

technical field [0001] The invention relates to the field of ultrasonic detection of shallow buried pipelines, in particular to a detection system design based on FPGA and LabVIEW. Background technique [0002] It is a common engineering technology to repair the cofferdam of buried oil pipeline leaks in shoals. Under the current technical conditions, the cofferdam operation cannot accurately locate the pipeline position and effectively reduce the scope of operation, resulting in greater maintenance costs and accident risks. In order to realize the intelligentization and automation of cofferdam repair work for oil pipeline leakage in shoal buried environment, the precise positioning of the radial cross-sectional circle position of the pipeline is essential. At present, there is no special research at home and abroad on this kind of equipment system that can monitor the edge position of buried pipeline targets in real time during construction and excavation operations. [1] . ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F17D5/06
CPCF17D5/06
Inventor 白志亮陈世利谢思捷曾周末
Owner TIANJIN UNIV
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